R2 highway range test with 20" inch A/T tires (Tom from State of Charge)

[macb00kemdanno]

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[R1Thrilled]

Not a bad result considering the tires, elevation gain, and windy section.

 

[mroe]

the overall efficiency of 3.0 mi/kwh is what I'd expect for this spec. I have a feeling some folks with more efficient tires, better conditions, etc. will be able to push the R2 to ~3.5 mi/kwh.

 

[Budman]

Solid result given the temperature variation and elevation charges. Lines up well with my running at 70 mph.

 

[Jeremy3292]

the overall efficiency of 3.0 mi/kwh is what I'd expect for this spec. I have a feeling some folks with more efficient tires, better conditions, etc. will be able to push the R2 to ~3.5 mi/kwh.

I agree. For reference, one my best trips ever was last week in my 2024 Model 3 Performance with 19” wheels. I got 266 miles on 89% of battery or roughly 300 miles on the full battery. I had to avg at least 70 mph during the trip too. That’s about 4.25 miles per kWh. So with R2 having a larger battery, I bet it could get close to the same 300 miles in the same conditions I drove in. Those headwinds Tom had are range killers. Pretty great it matches a Model 3 Performance!

 

[Jeremy3292]

FWIW I asked Gemini to analyze the video and reverse engineer the range without crosswinds and the uphill and it gave me 294 miles real world. Gemini said take out the AT tires and it clears 300 miles.

 

[UnsungZero_OldTimeAdMan]

the overall efficiency of 3.0 mi/kwh is what I'd expect for this spec. I have a feeling some folks with more efficient tires, better conditions, etc. will be able to push the R2 to ~3.5 mi/kwh.

Rivian's own information on R2 Premium is evidence. Same Pirelli Scorpion MS (same overall diameter) on either 20" or 21" wheels, same estimated max range of 330 mi.

 

[ksurfier]

Need to correct for elevation (6,000 ft) and resulting 20% lower density of air means compared to a result at sea level, this is over stated by several tenths…I get a corrected value of ~2.7 MPK. Temp likely also was a factor during this test…

Translating to Real-World RangeThe Rivian R2 features a usable battery capacity of approximately 86.8 kWh. Based on your target efficiency numbers, here is how the real-world math shakes out: Configuration / ScenarioEfficiencyExpected Total Range6,000 ft Baseline (70 mph)3.0 MPK~260 MilesSea Level Corrected (70 mph)2.7 MPK~234 MilesAll-Season Tires + Flat Ground~3.15 MPK~273 MilesDitching ATs & Dropping to 65 mph~3.5 MPK~303 Miles

 

[tivoboy]

Would seem that the AS 21” should give 10% more which is pretty much spot on for highway range expectation.

 

[SwampNut]

Need to correct for elevation (6,000 ft) and resulting 20% lower density of air means compared to a result at sea level, this is over stated by several tenths…

And the lower density negatively affects the air/fuel ratio.

 

[ksurfier]

Would seem that the AS 21” should give 10% more which is pretty much spot on for highway range expectation.

Maybe/maybe not?

R2 Efficiency/Range	MPK	MPK	Range (miles)	Range (miles)
Speed	21"	20"	21"	20"
48 mph	3.85	3.6	341	317
49 mph	3.76	3.50	334	310
49.5 mph	3.73	3.47	330	307
50 mph	3.69	3.43	327	304
55 mph	3.37	3.13	299	278
60 mph	3.09	2.88	274	255
65 mph	2.85	2.65	253	235
70 mph	2.64	2.45	234	217
75 mph	2.45	2.28	217	202
80 mph	2.30	2.14	203	189
85 mph	2.16	2.01	191	178
90 mph	2.03	1.89	180	168

 

[tivoboy]

Maybe/maybe not?
R2 Efficiency/RangeMPKMPKRange (miles)Range (miles)Speed21"20"21"20"48 mph3.853.634131749 mph3.763.5033431049.5 mph3.733.4733030750 mph3.693.4332730455 mph3.373.1329927860 mph3.092.8827425565 mph2.852.6525323570 mph2.642.4523421775 mph2.452.2821720280 mph2.302.1420318985 mph2.162.0119117890 mph2.031.89180168

Ok 8%.

 

[ksurfier]

Ok 8%.

closer: 7.755102040816

 

[ksurfier]

For any willing new R2 owners, would love to see 15 minute runs for the following speeds:
50 mph (speedo = 52)
65 mph (speedo = 67)
80 mph * - as long as complies with posted speed limit (speedo = 82)

 

[tivoboy]

closer: 7.755102040816

Tech finally 7.8 so I rounded up

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